Improvement in plane-irons



new I $iaiw ee effia.

IRA ALMY AND SERENO A. DRAKE, OF COVERT, NEW YORK.

Letters Patent No. 114,085, dated April 25, 1871.

IMPROVEMENT IN PLANE-IRONS.

The Schedule referred to in these Letters Patent and making part of the some.

To all whom 'it may concern:

Be it known that we, IRA ALMY and SERENO A. DRAKE, both of Covert, Seneca county, State of New York, have invented certain new and useful Improvements in Plane-Iron, of which thefollowing is a full, clear, and'exaet description, reference being had to the accompanying drawing making part of this specification, in which- Figure 1 is a view of our improved plane-iron with the parts arranged in a proper working relation to each other, and

Figure 2 is a detached view of the'lower iron or hit with the cap removed.

Similar letters of reference denote corresponding parts in both figures.

The invention relates to the construction of double irons-that is, those composed of two parts-to wit:

I a lower'or cutting-blade or bit, andan upper part or cap, this cap being attached to the bit by means of screw.

These double irons are usually employed in jointing-planes and smoothing-planea whcn smooth and accurate work is required.

TLJG iIIVQHtiOD consists in making the bit reversible, having both ends constructed with a cutting-edge, in combination with a cap having a longitudinal slot therein, as will be hereinafter fully explained.

In the drawing- A represents the cap, made, preferably, of wrought or malleable iron, and substantially in the form of an ordinary single plane-iron, except that, when in proper position in the plane-stock, the bevel at the lower end is upon the upper side instead of on the lower side, as

it is in a plane-iron. I

' This cap isprovided with a long narrow slot,enlarged into a circular form at the upper end, to adniit the passage of a-screw, which will soon be described.

B is the bit ,or cutting-blade, made in the form engage with a thread outin the central portion of the bit, as at b, fig; 2. By preference we provide the bit with arectangular rib, B, of such a width as will allow it to slip into the slot a, and of a height a little less than the thick-- nessofcapA.

. The object of this rib B is to assist in maintaining the bit and cap in a proper relation to each other when they are connected by means of the screw, as in fig.-1, and more particularly for the purpose of adj nsting the parallelism of the cutting-edge and the bottom or working face of the-plane-stock; but, as this rib may not in all cases be found to be essential, we do not wish to be limited to its use.

The constructionand operation of the device is so simple that a more detailed description is not deemed necessary.

Having now described the invention,

What we claim as new, and desire to seonle by Le ters Patent, is'- The-herein-described plane-iron, consisting of the cap A and the reversible bit B, substantiallyas shown and described.

IRA ALMY.-

SEBENO A. DRAKE.

Witnessesr.

JAMEs O. KNIGHT, 0. G. WHEELER. 

